Locking device



A. A. SAWYER LOCKING DEVICE Aug. 23, 1955 Filed July 21, 1952 INVENTOR ARCH/E A. SAWYER BY s= ATTORNEYS United States Patent LOCKING DEVICE Archie A. Sawyer, Laramie, Wyo.

Application July 21, 1952, Serial No. 299,968

Claims. (Cl. 29262) This invention relates to a locking device and more particularly to a locking device for frameless plate glass windows.

There are numerous types of window locking devices available for locking in closed position ordinary window sashes having frames. As is well known, the common type of window locking means provides engagement between elements on the top rail of the lower and the lower rail of the top sash. The operating means for such devices are available only from inside the building except by actually breaking the window pane. However, in the use of slidable plate glass windows wherein the lower edge of the upper sash is not provided with a frame to which parts of a fastening device can be secured, it is extremely diflicult to lock the window in closed position.

An important object of the present invention is to provide a novel locking device particularly intended for locking in closed position a pair of slidable plate glass window elements wherein the upper sash has no lower frame, the device having a locking element engageable beneath the edge of the upper sash to hold it in upper position while holding the lower sash in lower position, and wherein the locking element, while accessible from the outside of the building, cannot be moved to the unlocked position except by operating means accessible from the inside of the building.

A further object is to provide a device of the character referred to wherein the locking element is rotatable and endwise movable between locked and unlocked positions and wherein the locking element can be moved to unlocked position only by first rocking or rotating it, which operation can be performed only from within the building.

Other objects and advantages of the invention will become apparent during the course of the following description.

In the drawing I have shown one embodiment of the invention. In this showing:

Fig. l is a fragmentary vertical sectional view through adjacent portions of upper and lower plate glass sashes showing the present invention in elevation in the top rail associated with the lower sash;

Fig. 2 is a vertical axial sectional view through the locking device substantially enlarged, parts being shown in elevation;

Fig. 3 is a section on line 3-3 of Fig. 2;

Fig. 4 is a similar view on line 4-4 of Fig. 2;

Fig. 5 is a similar view on line 5-5 of Fig. 2, a portion of the knob being shown in elevation;

Fig. 6 is a perspective view of the locking bolt and associated elements; and

Fig. 7 is a detail perspective view of the latch element.

Referring to Fig. 1, the numerals 10 and 11 respectively indicate the upper and lower sashes of a window preferably formed of plate glass so as to possess sulficient strength to eliminate the necessity for frames except that the upper edge of the sash 11 is provided with 2,716,038 Patented Aug. 23, 1955 a rail 12 because of the offsetting of the sash for sliding movement in spaced channels. The rail 12 is provided with a sealing member 13 preferably in the form of a relatively rigid felt strip backed up by a spring 14 to maintain the member 13 in sealing engagement with the sash 10. The rail 12 is utilized for the mounting of the lock forming the subject matter of the present invention and indicated as a whole in Fig. 1 by the numeral 15.

Referring to Fig. 2, the body of the lock comprises a bolt indicated as a whole by the numeral 18. This bolt toward one end thereof has its normally top portion sloped downwardly as at 19 and such end of the bolt terminates in a generally upwardly extending hook 20. As shown in Fig. 1, the lower edge of the upper sash 10 is arranged in the angle between the surface 19 and the hook 20 when the bolt is locked, as will become more apparent below.

A plate 21 is fixed to the rail 12 by means of screws 22 (Fig. 3) and the bolt 18 is slidable in such plate. A second opposite plate 23 is attached to the rail 12 outwardly thereof by screws 24, and the bolt 18 also is slidable in the plate 23. Intermediate the two plates, the bolt carries diametrically opposite pins 25 (Figs. 2 and 4) which may be driven into openings 26 in the bolt. A coil spring 27 surrounds the bolt between the pins 25 and plate 23 and since the latter is stationary, the spring urges the bolt inwardly or to the left as viewed in Figs. 1 and 2.

The bolt 18 is provided with a cylindrical bore 30 in which is slidably arranged a rod 31 the left-hand end of which projects from the corresponding end of the bore 39 to form a push button 32. A spring 33 is arranged between the inner end of the bore 3% and the adjacent end of the rod 31 to urge the latter to the left to its normal position shown in Fig. 2. It is obvious that the pins 25 do not project into the bore 3% and consequently do not interfere with the sliding movement of the rod 31.

A handle or knob 35 is mounted on the inner or lefthand end of the bolt 18. A set screw 3s: extends through the knob 35 and is provided with an axial extension 37 which projects through the bolt 18 and into a slot 38 formed in the rod 31. The extension 37 acts to limit axial movement of the rod 31, the normal position of which under the influence of the spring 33 is shown in Fig. 2.

The rod 31 is provided in one side thereof with a recess 40 (Figs. 2 and 3) to receive a latch 41 pivoted to the rod 31 by a screw 42. The bolt 18, as shown in Fig. 3, is provided with a radial opening 43 for the insertion of the screw 42 into position. The latch 41 projects downwardly through a slot 44 formed in the bolt 18 and longitudinally elongated as shown in Fig. 2 to permit the bolt to swing to its unlocked position as shown in dotted lines. The rod 31 is provided with a recess 45 projecting longitudinally thereof and communicating with the recess 40. The recess 45 receives a coiled spring 46 engaging the upper end of the latch 41 to urge the latter to the operative position shown in solid lines in Fig. 2. To permit the latch 41 to swing to the inoperative position shown in dotted lines in Fig. 2, opposite walls of the recess 40 are sloped as at 47 and 48.

As shown in Figs. 2 and 6, the outer face of the plate 21 is provided with a radial groove 59 the lower end of which is undercut as at 51 to receive a projection 52 on the latch 41. When the latch is in its operative position, the lower end of the body of the latch is arranged in the radial groove while the projection 52 is arranged in the undercut 51, thus positively preventing turning movement of the bolt 18 on its axis.

Operation The parts normally occupy the solid line positions shown in Figs. 1 and'2, the projecting bolt end 20 lying outwardly of the sash 10 and the lower end of the latter lying in the angle ,between the slope 19, and hook or projection 20i' Obviously the sash '10 cannot be lowered and the sash 11 cannot be raised so-lon'g as the parts-are in the positions referred to; 'It will be apparent that thebolt 18 can be released from the sash"-'oniy by rotating the bolt and-sliding it 'endwise to the 'left'as-viewed in Figs. 1 and 2, until the projection 20 assumes the-dotted line position shown in Fig. 2. The latch'41' projects 7 through the'slot 44 which is 'o'fa width equal to the latch (Fig. 2) and the latch engages'thegrooves 50"and' '51 in the fixed plate- 21. Accordingly, the bolt'18' is normally fixed against turning movement. The hook 20 maintains the bolt against sliding movement to' the left, th'u's main taining the latch41 in its locking grooves. I

.When itis desired torelea'se the bolt, the operator "will 7 push tothe right on the push button 32 and the latch .41,

hearing against the right-hand end of the "slot 4'4 i'n'Fig'. 2 as the rod 31 moves endwise, swings the latch '41 in a clockwise direction to. assume the dotted line position in Fig. 2 relative to the rod 31'. Actually, the latch 41 will' be bodily moved to the right by sliding movement of the rod 31 but the latch swings clear of the groove 50 and undercut 51, thus freeing the bolt 18Ffo'r turning movement. Holding the button 31 depressed by his thumb, theoperat'or will then turn theknob 35" through 180 and then allow the knob to move toward the left under the influence of the spring 27. Thetnmingmov ment of the knob 35 swings the hook '20'through' 180 to project downwardly, whereupon the sliding movement ofthe bolt moves the hook 20 to the dotted line position,

shown. in Fig.2. The push button 32 and knob 35 are then released with the bolt wholly free of the sash 10.

This sash'then can be lowered or the sash 11 raised, or 'both operations may be performed.

The hook 20 is at an acute angle to the axis of the bolt 18 in the arrangement of the parts shown and the upperextreinity of the hook in Fig; 1 tends to swin'g in an arc of a circle in a plane perpendicular to the axis of thebolt. This turning movement is freely permitted,

however, since the bolt is endwise movable to the right as the hook 20 turns, and accordingly the hook is free to turn without binding against the sash 10.

Obviously, engagement of the left-hand end of the slot 38 engaging the member 37 limits movement of the rod '31 toward the right in Fig. 2 when the button 32 ispushed. However, the projection of the slot 38 to the left in Fig. 2 is unimportant so long as the length is great enough to permit suflicient movement of the rod 31 to a swing the latch 41 to inoperative position. The shoulder 48 and the left-hand limit of the slot 44 will engage the latch to limit'movement of the rod 31 toward the right regardless of the length of the slot 38. However, the slot 38 should be of such'length in the opposite direction to 7 limit sliding movement of the rod 31 toward the-leftwith the latch 41 in the fully operative position shown in solid lines in-Fig. 2.

The operation of locking the window will be obvious from the foregoing. The operatorwill' push the. button 32 to, swing the latch 41 to'inoperative position, push the knob 35 to the right to move the hook 21 inwardly beyond the sash 10, rotate the knob 35 through 180, and then release the knob 35 and push button 32. The knob 35 may be rocked to insure the engagement of the latch 41 in its grooves.

' From the foregoing it willbe' apparent that the'present device is 'highly effective for the locking of plate glass. frameless sashes. There is no frame carriedrby the sash 10 to which an element'ofa locking device can be hired. The present device Ipositively locks'the sashesin closed position and while the hook 20 is' accessible from outside the building, it can be released only by first rotating the boltand; this. is impossible because of the engagement .of

' denim-41in the groove 50 and the undercut 51. .The

1. A locking device --comprising abolt, means for'supporting said belt for turning movement on its axis and for axial sliding movement, means biasing said boltfor sliding movement in one direction, the end of said bolt opposite said direction having. a laterally projecting hook engageable with an element to be locked when said bolt is turned on its axis to a predetermined position, said hook being releasable from the element to be locked upon turning movement of'said bolt, a member slidable in said bolt and projecting from the :other end thereof, and a pivoted latch carried by.- said member, said bolt-beingprovided with a longitudinal slot through which said' latch projects laterally fromv said -=bolt, said: latch having an operative position engaging .a. stationary member to said bolt :against'tumingmovement when saidhook-is inlocking'sengagement with 'theelement-lto be'locked, means biasing said member .for' movement in one direction: in:

said boltto tend to move. said .latchto operative position and'said'latch being engageable with. one end of said slot upon.movement of said member in the other direction: to

' swing said latch. to unlatched position.

2. A-locking device comprising. an elongated bolt,.means inwardly of. the ends of said bolt supporting it for turning.

movement orr'its axisand .foraxial. sliding movement,

means biasing said bolt for sliding movement .in one direction,the-end ofsaid'bolt opposite said direction being provided with ailaterally projecting hook engageable with an element to be locked when -'said bolt is turned to. a..

predetermined position,.:the end of said bolt in.:said directionhavingran axial bore,a rod slidable in saidbore and:

biased-for movement in one'direction, anda latchipivotally connected to said rod, said boltbeing provided with-a longitudinak slotethrough which said latch projectslaterally from said-bolt :forengagement with a. stationary element toprevent turning of said bolt 'whensaid hook is in locking engagement with the elementvtor-be locked, 'said slot having amend against which 'said latch is engageable :up'on movement of saidrodrin the .other'direction to release said latchv whereby said. bolt-may be turned-to release said book from: the element to be. locked.

3. A locking device'comprising a bolt ofcircular cross.

section-throughoutthe greateriportionof its length, bearing means supporting said bolt f or turning movement on. I its axis and .for axial sliding movement, means biasing said bolt'for sliding movement in. one direction, a 'knob carried by said bolt at the end thereof in said direction;

ah'ook c'arried by'the other endofsaid bolt andprojecting laterally therefrom for engagement against the side of an element to be locked. opposite: said direction whensaid bolt iseturned tosa'predetermined position, the first namedx CHdEOf'SBld. 'bOIFbEiHgiPI-OVidCd with an axial bore, a .rod.

slidable in said bore'and projectingfrom the first named end of said'bolt=beyondsaidknobrto form apush button,

means biasing :saidv rod for .sliding;movement in said die 'rection, means limiting movement of said rod -in saiddirection to a normal position, and a latch havingmechanical engagement .with said rod. and operative when the latter is in normal-.apositionand said hook is-in locking engagement with said e'lement for fixing. said bolt against rotation, saidibolt having aportion'engageable with said latch upon movement of said rod .in the :other direction by operation of 'said push-button. forreleasing, said latch.

4. A locking device comprising a.bolt,.means for supporting said-boltfor rotation'on its axis and for axial sliding movement, said means comprising a stationary.

' element, means. biasing said. bolt-for sliding movementin one. direction,. said'l-b olt. having-a portion engageable. with an element to "be'loeked'when saiif'bolt is moved against its biasing means and is turned to a predetermined position, a member -mounted in said bolt for axial sliding movement relative thereto, a latch carried by said slidable member, said bolt having a radial slot through which an end of said latch projects and said stationary element having a radial groove in which said end of said latch is arranged when said bolt is in said predetermined position, and means biasing said slidable member in one direction to a normal operative position, said slidable member having an end projecting axially from said bolt to form a finger piece movable against said last-named biasing means to release said latch from said groove.

5. A locking device comprising a bolt, means supporting said bolt for rotation on its axis and for axial sliding movement, means biasing said bolt for sliding movement in one direction, said bolt being provided with a portion engageable with an element to be locked when said bolt is turned on its axis to a predetermined position and is moved away from its biased direction, said portion of said bolt being releasable from the element upon rotation of the bolt on its axis, a latch supported by said bolt and biased to an operative position locking said bolt against rotation when said portion thereof is in engagement with the element to be locked, said means for supporting said bolt for rotational and sliding movement comprising a plate having a recess therein receiving said latch when the latter is in operative position to fix said bolt against turning movement, and a push button having mechanical connection with said latch and operable for releasing it to release said bolt for turning movement on its axis.

References Cited in the file of this patent UNITED STATES PATENTS 960,585 Rosenberg June 7, 1910 1,326,937 Kasper Jan. 6, 1920 2,298,559 Fredholm Oct. 13, 1942 FOREIGN PATENTS 13,981 Netherlands May 15, 1925 207,119 Great Britain Nov. 11, 1923 

